Director



July 27 1926.

M. L. NELSON DIRECTOR 4 Sheets-Sheet 1 Filed June 13, 1924 Eur Emir M52727! L.Nalscm WW5 July 27 1926. 1,593,591

M- L. NELSON DIRECTOR Filed June '13. 1924 4 Sheets-Sheet 2 4 Sheets-:Sheet 3 w w L m m m 1 E W e L m J NNA July 27 1926.

JUL/EU ur- Harm LNEZsun fin- M. L. NELSON DIRECTOR Filed June 13, 1924 4 Sheets-Sheet 4 July 27 1926.

'IllglIIllllllllllllllllllllll!I! the Patented July 27, 1926 MARTIN-1L:- n nnson;

ILLINOIS, ASSIGNORLRY MESNE ASSIGNMENTS,

man:-

The.. .presen t invention-relates to directors,- or reg ster ng, translating,

DIRECTOR:

Application filed .T\1ne;-13, 1924,, Seria1,No.-,719.,719...-

and sending, ape

paratus fonuse 111 controlling, the establish? me t [of l systems;

which l directors are: used illustrated in, my. prior 1 with .R. G;- Richardson, Serial :No. 547,866,.

filed March; 29,1922,

In: rthetprzior, applic directoriis considered connections in automatic, telephone Ail-automatic telephone system. 1n

is described 7 and ation.v referred to the.

:from a' circuit standppint, and; its operation and functions are explained, but I in; the.

1 instant case the diret'teris considered from a structural angle, as a piece;of1 apparatus on mechanism; A

complete director comprises a, considerable number of, parts,- lIlGlIlCllIlg a number of separate-sw tching frame,T and o; it lhasbee order to. simplify-.thewiring and to provide when necessary, tov assemble all 'the- -variousparts together as a- The Ob e/Ct of. the present 1 intheorganization of; the different parts of a, director-so; that they the office reg ster 1s at. theleft where it is fer; easy substitution single unit vention,;,therefore, is

devices and may; constitutea single physical pieceof apparatus, which; ma

ated .likelany of the other units of;az Strow+ gensysteni.

Thea-various ,features-ofthe invention are,

more fully-- explained;

tailed; description; reference being had; to, accompanying; drawings, in whichew of av director c0n-,

be; installed and oper in the 1 following destructed according to the invention;

Eig. 21s areas-view;

Fig; 3L-1S wa seeton 0 n, theline A--A-, Fig;

2,, with the distributing frame 1 turned out;

ward onits hinges-so side; the

,Eigl 4: is-,- a; section Q on the line; lie-.13

Eign5-ris side view ofithe -test, jack assembly shown= from while-1 Fig.-

.as to show the back 6 is a fragmentary-view showing: the

construction-of a shelf l or rackuponwhich the ,directors are =Ino.un;ted.

The -essential partsf;a1 director are an, ofiice register,-,a pluralityof digit registers,

usually four, a..so-ca-lled master, digit; cona sequence switch, a p

. these, various parts joint application distributing n-- found -des1rable,,in

I topermit r adjustment number Varying witnthe, particulate-ir cuit used, and. a, distributing frame, I withthe necessary wiring and cabling. All r are] assembled and] mounted on a single frameso as to constt, tute. asingle unitary. :piece. of equipment;

t geth r.

The frame comprises ,two' pieces of angle .6

iron2and 3, bestfseen .in Figs-. 2, ,3 andfl, and, a-metaliplate grectangular in shape,. whichns secured to the -two\ pieces .of ,jangle I iron by. means of machine. screwsfas .sh,own.,

The rqalaeredgeofthe plateis bent at rightw angles so that, it extendstothereantofla. point 1' net beyond the. rearlje'dges of the 1 angle, irons. The dimensions -of the face;

of the plate are approximately :15 inchfes by,

18% inches.

On thefront; of. the frame plate are;- niounted all=the principal .parts ofthedi rector except the.- distributing. frame, which. is on; the. back; These parts'k will now be. pointedout-anddescrib'ed so far: as isnecessary.-

The devices on' the front Ofthe frame, Fig. 1, wilhbe; consideredjfirst. Of these,

indicated byreferenceletter Theofiica so toinsulatethe, switch framefrom the plate.

frame plate is-proyided v of the rotary magnets of the switch. Another openings 10 is pro-,. vided in order topassgth-e b'ankcables to the rear of the frame. Two .-fibre-;strips .11 and 12,, seen best. in-Eig- 2, fittightly; aroundthecables and close opening: 10., I

The-five small switches at the top and tothe; right) are small rotary switches: of the type known; in the art 1 as a 3 minor switch, Aswitchofthis type hasa shortshaf-t car-- rying 0116 0111'31016 wipers, a net which rotates the shaft by means .of an'; ordinary ratchet, and pawl mechanism, and a release magnet whichcontrols-itheratchetretaining,pa-wl.- It also has an arcuate: bank of ten contacts or sets of contacts, and may have one or more pairs of off-normal springs.

Anopening ,9 -in the,

through which.

driving mag whatever relays These switches are mounted on the frame plate similar to the way in which relays are mounted, as may be seen from Figs. 1 and 4. The latter figure shows the means for mounting the first minor switch hi, consisting of two machine screws 14 and 15, passing through the frame plate and entering the sw'tch frame. Figure 1 shows the drilling of the frame for the switch magnet terminals and mounting screws, attention being directed to the vacant or extra space to the right of minor switch 1\ Holes 17, 18, 20, and 21 are provided to pass the terminals, holes 16 and 22 are for the mounting screws such as 14 and 15, while hole 19 prov'des room for the head of the screw by which the driving magnet is held in the switch frame. Just behind the switch banks a large rectangular opening 23 is provided through which the bank wires (not shown pass to the rear. As to the functions of the switches shown, the first one at the left, M, is the master digit controller, or steering switch, by means of which the register con trol circuit is associated with the different register switches successively. The other four minor switches, M to M, inclusive, are the four digit registers.

Just to the right of the bank of the office register are mounted two switches of the well known rotary line switch type, in which the wipers move in a forward direction'only. Of these switches, the one at the left, switch S, is the sending switch, which counts the impulse trains under controi of the registers; while the other one, switch S, is the sequence switch, by means of which the sending switch is placed under the control of the different registers successively. These switches have a special mounting in order to reduce noise and vibration. The switch frames are secured to upper and lower brackets 25 and 26, which are flexibly attached to the main frame plate by means of two pieces of leather 27 and 28.

The relays are mounted in the lower right hand corner and ten are indicated in Fig. 1, although space is provided for eighteen. It will be understood that the number of relays required will depend on the particular circuit used, as will also the spring combinations on the relays. On this account no attempt has been made to show all the relays complete. It will be understood that are necessary are mounted in the usual manner with the coil and spring terminals extending to the rear of the frame plate through holes provided for this purpose. The arrangement is believed to be sufficiently indicated in Fig. 1.

The reference letter T indicates a so-called test jack, not mentioned heretofore, which is secured to the front of the frame plate in a manner more particularly shown in F ig. 5. The complete test jack assembly with the parts named from top to bottom as they appear in Fig. 5, comprises a busying key for making the director artificially busy, a. busy lamp which is lighted while the director is in use, and two jacks by means of which a test set may be connected to the register control and sending circuits.

Passing now to the rear of the frame plate, and referring more particularly to Fig. 52, the distributing frame will be ex plained briefly. This comprises two in boards 30 and 81, of wood or other insu ating material, and eleven bus bars 32, which are separated b insulation strips 33 and clamped between the two pin boards. The clamping is effected by means of three bolts 34, 35, and 36, which hold all the parts firmly together. Each of the bus bars is provided with projecting pins or terminals which line up with the rows of pins on the two pin boards. The distributing frame is attached to the frame plate by means of two brackets 37 and 238, seen most clearly in Fig. 3, and a bolt 39 which extends through both brackets and the distributing frame. This arrangement provides a hinge, permitting the distributing frame to be rotated outward away from the main frame plate as shown in Fig. 3, so that ready access may be had to the rear of the director, or rather to that portion of it which is normally covered up by the distributing frame. In order to hold the distributing frame against turning on its hinge except when desired a small bracket -10 is provided, secured by bolt at one end and by a machine screw to the main frame plate at the other end.

The pin boards are used for terminating the conductors coming from the banks of the office register J. There are four hundred of these conductors (switch J having four wipers) which pass through the frame plate in two cables. After reaching the distributing frame these cables are split and formed into two other cables which are fanned out on the upper and lower pin boards insets of four. Perforated fibre spreaders 41 and 12 are provided. On leaving the cable each set of four conductors goes through an opening in the adjacent spreader, after which the conductors are pulled tight around the front edge of the spreader, Fig. 2, and are soldered to the proper set of pins. The order in which the different sets of conductors are fanned out makes no particular difference, but it may be stated that according to the scheme adopted sets 1136, inclusive, are terminated at the upper left hand portion of the frame, Fig. :2; sets 37-50, inclusive, are terminated at the upper ri ht hand portion; sets 61-86 are terminated at the lower left hand portion; while sets 87-00, inclusive, are terminated at the lower right hand portion.

' thanathe maximunr 'number"of office code digits rareztoribevtransmitted; Thelast bus barsisthedirector:cutJofE bus bar.- This one is usually connected-to airelay whiclrbringsv about therreleaser :of fthe director wunder certaim circumstances.:- v

close (check: .onthe numberrof pins :in theitwo pin boards; willv show that there are two extraiasets :at-.thearightaiwhich are not required for; the-'iconductors from the banks I I Of'ltll'el ofiicevregis'ter, These two: eXtra sets of 2 pins. are used-.1 to:- terminate conductors comingzifrom springq contactson special relays asuchr as'ithe Ide ad. number? relay-or the operator relay. Other extra sets of pins mayizbe provided of rcoursewheir needed.

Thezrwires coming: from: :the office register are-iconnected to: the pins close up. to the pin board i'sos: as to: leave.- the ends :of the pins free for: attachment of 1' jumpers. These jumpers are run vertically in the spacesbetween theavertical rows offpins, those coming fFOHFlLllB J-UPPGB pin: board extending; downwarclrrtor the: proper busbars; while. those coming; fromsi the lower pin board extend upwardzj, and-inlay: overlapz. those.- from the upper pin boardrin-some cases; In: order" not ,Zto=+confuse the drawing onlyr one set of jumpers is shown; .but this? is sufiicient to explain 'wliatj L is done;

It has not been considered necessary or desirable to show all the wiring between the various switches and the wiring on the individual switches themselves; in fact this would be very diflicult if not impossible. A few of the main cables have been shown, however. The bank cables extending between the oflice register and the distributing frame have already been pointed out. Cable 50, Figs. 2 and 3, contains the conductors from the special relays and the conductors for connecting up the distributing frame bus bars. Cable 52 contains the conductors extending to the director jack. Cables 53 and 54, Fig. 1, are composed of wires terminatin in the sending and sequence switches S and S. Other minor cables are indicated but need not be described, as it will be understood that the wiring in general follows standard practice.

In order to protect the wiring at the rear of the director, consisting mostly of the connections to the relays and the minor switches,

a cover plate 65,: Figs. .2 and 14, is provided: This cover plateis secured". atthe left -by small machine screws 1 as shown and' at the right by, two clips such -as -56,-F-ig.2. Only one clip can be seen astheother isconcealed behind the distributing frame. A front; cover. (not shown) ,:1salso. provided. This isshaped like aboxandr-is deep enough to enclose all the apparatus in :front and have its edges resting against the; main frame.- ln order to :hold the front coverin! position eight bolts or studs '7 are provided. These project out from theface ofi'the framep tightly engaged by thecndsvplate.

plate and are and corners of the front cover,- .which is thus held inplace by friction. An opening in-the-cover is provided which :is-closed by. the escutcheon plate of thetcstack assembly T when the cover is in placer. This gives access-to the-test jack and busy=key withoutremoving. the cover.

Directors such as the one hereindescribed are intendednto be 'lllStEtllQCl OII ShGlYQSrOB; racks like ordinary Strowgerselector or connector switches. Thismay beexplained in connection with Fig. 6. Theusual uprights are. provided connected by pairs of horizon I tal angle irons-such as and .61, only small;

sections of the latter, or enough to. provide;

mounting space for one director,', being shown. To each pair: ofhorizont'al'angle-- irons vertical members suchas 62. and-6B aresecured by welding or riveting; these members being spaced apart adistanoe equal. to the width of a director; Each vertical member has three pins such as or extending clearthrough and-projectingaon .both sides.

These pins are for hanging-thedirectors on the shelf or-rack and are engaged by -.curved. slot such as '66,F1gs. 3and hnthewerticalang1e -1rons of the director frames; Be

tween each :pair of vertical'imembers such as 62 and 63, or at each director mounting space, the lower horizontal angle iron carries a female jack as shown in Fig. 6 which is engaged by the male jack of the director, Fig. 2, when the director is hung in place. The method of mounting described makes it possible to quickly and easily remove a defective director and replace it with a good one.

Reference has been made hereinbefore to application Serial No. 547,866 which discloses the circuits and describes the operation of a director of the general type disclosed herein. The circuits of the prior application, however, do not conform strictly to the physical apparatus as herein disclosed in all details. For instance, in the prior application a plurality of skip bus bars are used whereas the present case only shows one. Again, the prior application shows a sequence switch having four wipers, whereas only three are shown on the sequence switch disclosed herein. For a full disclosure of suitable circuit arrangements, therefore, reference is made to my pending application Serial No. 663,058, filed September 17, 1923, and to the pending application of Bellamy et al, Serial No. 659,304, filed August- 25, 1923.

In order to facilitate the inidcrstanding of my invention I have described in considerable detail a certain concrete embodiment of the invention, but it will be understood that this was intended merely by way of example, and that the invention is not to be limited to the particular form shown and described.

IVhat I consider to be new, therefore, and desire to have protected by Letters Patent will be pointed out in the appended claims.

hat I claim is 1. A director comprising a frame, registering, translating, and sending apparatus mounted on said frame, a jack for connecting the director 'ith a trunk circuit, and permanent wires and cables connecting the pieces of apparatus on said director with each other and with said jack.

2. A. director comprising a frame, registering and sending apparatus mounted on one side of said frame, and a distributing frame mounted on the other side of said frame.

3. A director comprisin a. frame, an office register, digit registers, and a sending switch all mounted on one side of said frame, a distributing frame mounted on the other side of said frame, and cables connecting the bank of said ofice register with said distributing frame.

4. In a director, a main frame, an ofiice register and a sending switch mounted on said frame, a distributing frame comprising sets of terminals and a plurality of bus bars, cables connecting said sets of terminals with the banks of said office registers, and

another cable connecting said bus bars with said sending switch.

5. In a director, a main frame, a distributing frame comprising two terminal boards spaced apart and hinged to said main frame and a plurality of bus bars positioned between said terminal boards where they can be reached by jumpers coming from either terminal board.

6. A distributing frame for directors comprising two terminal boards, a plurality of insulated bus bars clamped between said terminal boards, cables having their various wires connected to the terminals of the terminal boards, and jumpers for connecting said terminals to said bus bars.

7. A mounting frame for a complete director comprising means for attaching the frame to a rack, mounting spaces on one side of said frame for mounting register sender and sequence switches, and a plurality of relays, and means on the other side of said frame for mounting a distributing frame, said mounting frame having suitable openings where needed for passing the various cables and wires from one side of the frame to the other.

8. In combination with a director, a distributing frame, cables connecting the director to certain terminals of the distributing frame and jumpers connecting wires of said cables to other terminals of the distributing frame.

9. A support, a director comprising registering, translating, and sending apparatus mounted on said support. a distributing frame also secured to said support, and cables connecting said registering apparatus with said distributing frame.

In witness whereof, I hereunto subscribe my name this 3d day of June, A. D., 1924.

MARTIN L. NELSON. 

